A savory mushroom filling can be made a day ahead, and can be served with the fish or on its own. If you are serving a large group, divide the filling into eight equal portions. If you are serving a small crowd, you can stuff sole fillets individually with some of the remaining stuffing, and bake them for 25 to 30 minutes. To prepare the spinach souffles, crumble breton crackers and place them in a shallow bowl.
This website provides approximate nutrition information for convenience and as a courtesy only. Nutrition data is gathered primarily from the Spoonacular Database, whenever available, or otherwise other online calculators.